What is CVE-2026-77877?

CVE-2026-77877 is a high-severity vulnerability in Control Web Panel, classified under Missing Authentication for Critical Function. CVSS score: 8.4/10. Published 2026-11-02.

How severe is CVE-2026-77877?

High severity. CVSS v3 base score is 8.4 out of 10.

Auth bypass in Control Web Panel

CVE-2026-77877

Control Web Panel (CWP) before webpanel_version 1.30 contains a missing authentication vulnerability that allows attackers able to reach the loopback API service to invoke root-privileged API routes without presenting an access token. Attackers can access endpoints such as /v1/restoredatabase/, /generaluser/, /last_access/, /valid_user/, /valid_token/, and /user_panel_dashboard/ to perform unauthorized actions with root privileges.

Vulnerability class: Broken Authentication

Published 2026-11-02 · last modified 2026-11-02.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Control Web Panel

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

VulnCheck Blog (technical-description, exploit)
control-webpanel.com/changelog (release-notes, patch)
www.vulncheck.com/advisories/control-web-panel-cwp-unauthenticated-loopback-api… (third-party-advisory)

Frequently asked questions

What is CVE-2026-77877?: CVE-2026-77877 is a high-severity vulnerability in Control Web Panel, classified under Missing Authentication for Critical Function. CVSS score: 8.4/10. Published 2026-11-02.
How severe is CVE-2026-77877?: High severity. CVSS v3 base score is 8.4 out of 10.